[beany] claims that some restaurants use warm colors
like red to make customers eat faster:
[link].

Assuming that's true, you could have a restaurant where
the color temperature of the lighting
changes from warm white to cool white and back,
sinusoidally, every few minutes. (The color
temperature
rate of change would be slow enough to not
be noticeable if you were watching
the lights, but if you looked at the absolute color
temperature (rather than its rate of
change) several times over your eating session, you
would notice it was not constant.) This
would cause patrons to speed up and slow down their
eating, which might be amusing. You
could even make different sections of the restaurant eat
at different rates, and see which is
more powerful: color temperature or peer pressure.